Researchers studied the association between birth mothers sm

Researchers studied the association between birth mother’s smoking habits and the birth weights of their babies. A sample of size n = 11 subjects was selected from each of the four groups.

Group 1 – nonsmokers

Group 2 – smokers who smoked less that 1 pack per day

Group 3 – smokers who smoke more than 1 Pack but less than 2 packs per day

Group 4 –smokers who smoke more than 2 packs per day.

The summary statistic of baby weights (in gram) are given as follows:

a) Find the degrees of freedoms

b) Find SSB and MSB

c) Find SSW and MSW

d) Find the numerical value of F statistic

e) Find the p-value (or a range from F table)

Solution

Let us prepare anova table as follows: